Furnace fob heatihg buildings



W 3-Sheets-Sheet 1. B. W. DUNKLEE;

Air Heating Furnace. No. 2 3,907. Patented May 10, 1859;

3. Sheets-Sheet 2.

B. W. DUNKLEE.

Air Heating F urnace. Y v

I Paten ted May 10, 1859.

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w, Pc'rzns. Phulvlilhognvhtr. Washington. no.

TED STATES B. WELLS DUNKLEIG, OF PORTON, MASSA (ll-iljSll'lilS.

FURNACE FOR HEATING BUILDINGS.

Specification of Letters Patent No. 23,907, dated May 10, 1859.

'lb all whom it may concern:

Be it known that I, B. VVELLs DUNKLEE, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Air-Heating Furnace; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, of which- Figure 1, denotes a front elevation of the same. Fig. 2, a vertical and longitudinal section of it. Fig. 3, a horizontal section taken through its fire pot dome. Fig. 4, a horizontal section taken through the fines under its ash pit. Fig. 5, a side view of the internal parts of the furnace, that are inclosed within the external chamber or its case. Fig. 6, is a transverse vertical and central section of the said furnace.

The nature of my invention consists in combining with the fire pot and its dome, one or more gas circulatin pipes arranged with respect to the same as iereinafter specified. Also, in a peculiar application and arrangement of air discharge pipes and partitions or wings with respect to the outer surface of the fire pot dome. Also, in the application and arrangement of one or-more air heating pipes whereby air is made to pass through the hot air chamber, and into the rear part of the ash pit. Also, in a double regulator valve arranged and applied with respect to the discharge flues within andout of the base part of the furnace as hereinafter specified.

In the drawings, A, exhibits the fire pot or chamber of combustion; B, its grate; C, its supplying throat; while D, is the ash pit or box under the grate, the same being constructed and furnished with doors, a, b, in the usual manner.

The throat C, extends from the inverted conical or base part, 0, such part 0, serving to receive and support a semispherical dome, E, the whole being arranged as shown in the drawings. This dome is furnished with a series of radial wings, (Z, d, d, which extend from its outer surface toward the inner surface of the external casing or air chamber F, and so as to meet or nearly touch the same. Each wing may extend from the base of the dome, nearly or quite to its top. I prefer however, that it should terminate a short distance from the top so that there may be a communication between the upper parts of all the spaces between the wings. The

pipes for the discharge of heated air from the air chamber are shown at e, 6, each being placed so as to open between two of the wings. These wings have a'twogfold purpose, that is to say, they not only operate to conduct heat from the fire pot dome and radiate such heat into the air within the air chamber, but they serve to equalize the distribution of heated air into the several air discharge pipes, .e, e, or prevent any one of them from receiving an undue share of hot air, or robbing any other pipe of its share of the hot air. It is well known, that in hot air furnaces, it is a very common thing-for some one or more of the discharge pipes leading to different apartments of a bullding' to rob the rest of their due share or shares of the heated air and that this 1s a difficulty which has not been easy, if posslble, heretofore to obviate. By means not only of the application of radial wings to the dome, E, but the arrangement of the air discharge pipes above described, the diiiiculty above alluded to is materially if not entirely diminished. Furthermore, one or more gas circulating pipes g, may be extended from the upper part of the fire dome down its outside surface and made to open into and through the interior of the lower part of the conical portion, 0, of the fire-pot, the same being as shown in Figs. 5, and 6.

Each pipe, g, should open into the upper part of the fire pot dome and it serves the purpose of carrying downward toward the top of the fuel, the combustible gases, that may accumulate withln the upper part of the fire dome and not be in proper reach of the flame or fire. They will circulate through the said pipe and by it be d1scharged directly into the flame or upon the fuel, thereby causing a more perfect combustion of the gases. than would otherwise take place.

From the portion, 0, on which the fireplace dome rests, two series of pipes, i, h, z', are carried downward to the base part, G, of the furnace, the said two series of pipes being on opposite sides of the fire pot and ash pit. These pipes open out of the chamber of combustion and into the base part, G. The center pipe, h, I to m the primary pipe because I usually construct it much larger in diameter than either of the others, 2', 11, which I term the auxiliary pipes. Furthermore, another pipe H, is also carried clownward from the part, 0, and at the rear portion of the fire pot as shown in Fig. 2. This pipe has a damper, 7c, in its upper part and over a branch discharge pipe or fine, Z, leading out of the pipe, H, and into a chimney when the furnace is in use. Furthermore, the base part, G, is a hollow chamber divided into three fines, m, n, a, by two vertical partitions, 0, 0, arranged within the said base as shown in Figs. 2, and 4;. The pipe, H, opens out of the rear part of the middle flue, n, as exhibited in Fig. 2. Viithin the said line, 11-, I place a plate, 7), which 1. term a hoe valve, as it serves not only as a valve to the pipe, H, but as a scraper or means of cleaning the fine, a, of ashes or soot that may accumulate therein. The said plate, 72. extends from top to bottom and from side to side, or nearly so, of the fine, a, and is connected with another plate or door, '2', by means of two rods, 8, s, which extend through an air opening, 25, made in the front of the base part, G, the plate, '1', serving as a covering to the said opening. By drawing forward the plate, I at the same time more the hoe valve, 22, and as I uncover the opening. I more or less arrest the escape of the volatile products of combustion from the line, it, into the pipe, H.

From. the above, it will be seen that the hoe valve, 79, the plate or door, 1', and the opening, 2, arranged and applied together and with respect to the fine, n, and the pipe, it, as described, enable me to obtain important advantages in cleansing the said line, as well as in regulating the draft of the furnace. Within the ash pit door, I place an air register and valve, u, for the purpose of regulating the passage of air into the ash pit; and furthern'iore, I lead a pipe, 4.. from the front part of the furnace through the hot air chamber and open itinto the rear part of the ash pit, the same serving as another means of supplying the ash pit with air. This pipe, 0, at its front end should open out of the outer wall or case of the furnace and into the surrounding air. By passing through the hot air chamber, the said pipe, 0, (when the furnace is in operation) becomes heated and will warm the current of air that may be flowing through it whereby combustion of the fuel will be promoted.

When the ash pit is supplied With air only through its front register, the current that branch, Z.

may pass through the register is very apt to "low unequally into the fuel, more of 1t being received into the front of the fire pot than into the rear thereof. The object of the pipe, 2), therefore, is to malre up for the deficiency, as well as to supply the rear part of the fuel with heated air, thereby improving and promoting its combustion.

In the operation of a furnace so constructed, the heated volatile products after circulating within the fire dome descend through the two series of pipes 72, i, 2", into the fines, m, n; from thence they pass forward lnto the flue, a, from which they escape through the pipe, H, and its discharging branch, Z, the damper, 7c, being closed in the meantime. By opening the said damper the volatile products of combustion will not descend through the pipes, 71-, z, 2 but will flow directly from the fire dome into the upper part of the pipe, H, and from thence into the The vertical pipes and the base portion, G, of the furnace serve as radiators or means of heating the air that may be caused to pass into the hot chamber through one or more openin s, '10, w, ar ranged in its lower part.

ilaving thus described my innproved furnace what I claim is as .llo..-'s, that is to say,

1. I claim combining with the fire-pot and its dome, one or more gas circulating pipes, 9, arranged with respect to the same and in the hot air chamber of the case, F, substanti ally as described.

2. I also claim the arrangement of the hot air discharge pipes, c, c, and the wings,

ll, of the arch of the fire dome, the same being and for the purpose described.

3. I also claim in connection with the air register to the front of the :sh. pit, an air pipe, '0, carried through the hot air chamber and into the rear part of the ash pit, the same being substantially as and for the purpose set forth.

t1 also claim the combination and arrangement of the hoe valve, 7), and the plate or door, 1', with the line, a, the pipe, H, and the opening, 25,. the same being as and for the purpose substantially as described.

B. ELLS DUNKLEE. lVitnesses:

1t. H. EDDY, F. P. HALE, Jr.

J. RUPERTUS. Priming-Cock.

No. 23,952 i v Patented MaylO, 1859'. 

